/**
 * Copyright 2008 Mathias Doenitz, http://lis.to/
 *
 * This file is part of the lis.to java desktop client. The lis.to java desktop client is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * The lis.to java desktop client is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with the lis.to java desktop client.
 * If not, see http://www.gnu.org/licenses/
 */

package listo.client.dialogs.autocompletion;

import com.google.inject.Inject;
import com.google.inject.Singleton;
import listo.client.Lang;
import listo.client.Preferences;
import listo.utils.swing.AutoCompleter;
import listo.utils.types.Cal;

import java.text.DateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;

import org.apache.commons.lang.StringUtils;

import javax.swing.*;

@Singleton
public class DueTimeCompleter extends BaseCompleter {

    private static DateFormat timeFormat;

    @Inject
    public DueTimeCompleter(Preferences preferences, Lang lang) {
        // lazily init the completion options
        if (timeFormat == null) {
            timeFormat = lang.getTimeFormat();
            int step = preferences.getTimeCompletionMinuteStep();
            int count = 24 * 60 / step;
            GregorianCalendar cal = new Cal().beginningOfDay().getCalendar();
            for (int i = 0; i < count; i++) {
                availableOptions.add(timeFormat.format(cal.getTime()));
                cal.add(Calendar.MINUTE, step);
            }
        }
    }

    public void provideAutoCompletion(final AutoCompleter.Context context) {
        super.provideAutoCompletion(context);
        if (context.getEventType() == AutoCompleter.EventType.TextTyped &&
                StringUtils.isNotEmpty(context.getCurrentWordTrimmedLower())) {
            context.select(bestMatch(context.getCurrentWordTrimmedLower(), context.getOptions()));
        } else if (context.getEventType() == AutoCompleter.EventType.UserRequest) {
            context.select(availableOptions.size() / 2);
        } else if (context.getEventType() == AutoCompleter.EventType.FocusGained) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    context.getOptionsList().ensureIndexIsVisible(availableOptions.size() / 2);
                }
            });
        }
    }

}